skeletal system axial skeleton anatomy. the skull 8 cranial bones: occipital, parietal, frontal,...

Skeletal System

Axial Skeleton Anatomy

The skull8 cranial bones: occipital, parietal, frontal, temporal, sphenoid, ethmoid14 facial bones

Sphenoid bone: keystone bone because it touches all other cranial bonesSella turcica – holds the pituitary glandEthomoidCristal galli and cribriform plates hold the olfactory bulb (nerves)

Figure 6.12c

Sinuses: Special openings that lighten the skull, warm and moisten air

Hyoid bone – only bone that doesn’t articulate with another boneAnchors the tongue.

7

12

5

Bone Markings of Vertebra

Atlas and Axis (C1 and C2)

Sacrum and Coccyx – fused vertebra

Ribs (12 pair)True (7) connect directly to sternum via coastal cartilageFalse (3) connect indirectlyFloating (2) don’t connect

Axial Practice QuizAnterior View

Any number with an *, name the Bone marking.For all numbers, namethe bone.

1

2*

3

4

5*

6

7*

8

Lateral view of skull

1*

2*3*

4*

5*

67*

8

9

10

11

12*

13

Medial view of skull

1*

2

3

4

5*

6

Superior View of Skull after transverse cut.

1*

2*

3

4*

5*

6*

Inferior view of skull

1

2*

3*

4

5*

6*

7

8

1*

2*

3

4*

5

6

7*

Name the bones of the vertebral column and give the number of vertebra for each category.

1

2 3

45*

1

2*

3*

4*

7*

8*

9*10

1*

2*

3

4*

5*

6*

7

8*

9*

10*